OK, we did it. Just hooked up (roughly) tonight. Pretty simple, hooked up across the old unit in about half an hour. It helped that I had an additional ethernet drop in the garage we added a while back - almost like this was meant to happen...

Just need to keep track of AC1 and AC2 - they are labelled on both the hunter and this device (I verified AC1 in both cases connects to the common internally). Used the existing Hunter power supply for both.

Did not automatically show up on the network, but was able to go to the router and list the connections. Maybe there was some other way to do this, I did not read the directions. Then changed from DHCP to static IP, and synced up the time to the computer so it was correct.

One nice thing is that you can assign names that make sense to the zones (I have a diagram in the garage because I can never remember), also allows you to run them every other day if desired.

There is also a setting for absolute max run time, in case you manage to program it for some crazy amount. You can also connect a rain sensor.